Dragqueen,
Have just got back from the doc ,a check up after having pacemaker fitted two weeks ago,he reckons I'm OK for some strenous exercise now,so if you let me know where you live I'll give the "white van man" a rest.
As an afterthought,Neatsfoot Oil is very good on old harness leather,you might try that to soften the seals.
Lister
Always here to help